Question

To drive safely, the air pressure in your tires should be between 20 and 30 psi. Write this as an absolute value inequality, with x as the air pressure.

Answer 1

Given that for a safe drive the pressure of the car should be between 20 and 30 psi. This implies that the pressure in the tires should strictly be between 20 and 30, hence given that the x is the pressure value then the absolute value inequality will be:
20≤ΙxΙ≤30